If all you have is swirl marks, I would skip the sanding and just buff. Sanding is only needed to remove orange peel or scratches that are a little deeper in the clear coat.If you have never done this before but want to give it a try, I highly recommend practice on an older car or something else first.
I used to have my own Auto Detailing business, and have color sanded and buffed many many paint jobs including several, million dollar cars, that were auctioned off at the Barret Jackson Auction in Scottsdale, AZ.
My recommendations:
1st of all my used 05 Pitbull is black and had alot of swirls too. I cut and buffed it to a show shine.
Always start with the LEAST AGGRESSIVE first, if that doesn't work go up a step, and yet another step if needed. These paint jobs have already been color sanded to remove orange peel, so the depth of the clear may be somewhat thin.
Steps to repairing clear coat:
1) Most aggressive : Wet sand with 2000 grit (not recommended unless removing major flaws such as orange peel or deeper scratches
2) Agressive: Buff using Meguiars Diamond cut 2.0 with 6" pad (PN W-7006) start cutting at about 3000-3500 RPM (4000RMP max if realy rough)
3) Less Agressive

olish with Meguiars Swirl remover 2.0 using 6" pad (PN W9006) Buff at approx 2800RPM and reduce to 2200RPM as product is being worked in.
4) 0 Aggresive, hand polish with Show Car Glaze.
Mine was pretty dull so I used steps 2 thru 4. Again, experiment on something less valuable 1st.
Ken